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R. P. SELLON 8E WJMQ MORDEY. REGULATOR FOR ALTERNATING OU RRENT GENERATORS.

No. 392,370. Pate nted Nov. 18 8.

(No Model.)

BESTAVAILABLE COP:

v r 2 Sheets-Sheet 2.. .R. PI"'SELLON & W. MORDE-Y. REGULATOR FOR ALTERNATINGGURRBNT GENERATORS.

No Model.)

Patented, N0v.- 6,

' FIG -3";

I Great Britain and Ireland, residing at Vic UNITED dramas BEST AVAlLABLE COP li arnit'r G -t rrent ROBERT PERCY SELLON AYD WILLIAII M. MORDEY, OF 'VlCTOR [A \VORKS, BELVEDERE ROAD, COUNTY OF SURREY, EKGLAND, ASSIGNORS OF ONE THIRD TO CHARLES E. \VEBBER, OF SAME PLACE] REGULATOR FOR ALT-ERNATlNG-CURRENT clause/irons.

SPECIFICATION forming part of Letters Patent ltl'o. 392,370, dated November 6, 1888. Application filed June 8. 1887. Serial No. 240.656. (No model.) l ntented in England December 18, 18:6,No. 16,662,

To all whom/it 72mg concern:

Be it known that we, tonnar PERCY SEL- Lornelectrical engineer, and W ILLIAM Mourns MORDEY, electrician, subjects of the Queen of toria Works, Belvedere Road, in the county of Surrey, England, havejoi ntly invented certain new and uselful Improvements i'n Regulating Electric Generators, (for which we and 0 'Charles E'. Webber have applied for a patent t -in"Great, Britain on ,Decem-ber lS, 1886, No.

16,662,)of which the followingis a specilieation. Y Our-ifventionrelates' to the regulation of the supply of electrical energyderived from alternate-currentmachines. ,n H

In' a system-of distribution of electrical energy forlighting, heating, or other purposes it is usual to work either on the-series sys 2o teinthat is, where the various devices,such as are or incandescent la psor groups of them, are placed in electrica series with one another-0r on the parallel system-that is, where the devices are placed in derivation across the main wires supplying electricity. In the first case the desideratuin is to main tain' a constant strength of current throughout the circuit. In theisecond case the desideia tum is to'maintain' the electro-motive force 3o constant at the points of consumption and approximately constant at the eleetric generator or generators." This invention consists in means for regulating the supply of electrical energy from alternate-current generators, so as to attain either of these ends.

The accompanying drawings will serve to make clear the new or improved means for obtaining regulation of the supply of electrical 40 energy from alternate-currentdynainoelcctric machines.

In the figures similar letters indicate simi- 4 lar parts throughout.

Figures 1, 2, 3, and/t are diagrams showing such new or improvedmeans.

According to our invention the excitingcurreut for the iie1d-magnet coils of the generator or generators is usually obtained from aseparate .dynamo-machine. The excitingso current yielded by this second machine is vafield-magnets of the second or'exciting dynamo to be varied in strengthsuchas by the action .of a resistance placed as a shunt around or in scrieswith the field-magnets ot the second or exciting dynamo, the extent of which resistance is varied by the varying attracting force of the magnet o'r magnets, on by the action of a similarly-actuated switch, whereby suitable variation is made in the number of field-coils of the exciting-dynamo in circuit or by other appropriate action. The controlling electroinagnet or its equivalent must be such as to be actuated by alternating currents, being adapted to respond to such currents by lamination of the iron core, slitting of the metal bobbin where used, or other appropriate means; and we may make use of any device or principle such as the expansion of a wire traversed by the current. Thus a variation from the constancy of the conditions of supply of the primary generators will cause a corresponding variation in the magnet or magnets of the automatic regulator. This again will cause a variation in the strength of the magnetic field of the second orexciting generator. and so cause the latter-to yield an increased or diminished exciting-current to the primary generator until the required conditions of supply, whether of constant current or constant potential, are reestablished. 'lhetendency will be always to automatically maintain the conditions of supply as nearly constant as possible.

In Fig. 1,A is the armature of an alternate current generator supplying electrical energy to the mains at M M; l, the field magnet or magnets of the same, supplied with current by the separate exciting-dynamo D. The fieldwinding of l) is shunted by the variable resist ance R, and the magnet S, which controls the variable resistance It, is magnetized by being placed in slmnt-conuection with the mains M we such-variation will aifect the magnet S, causit to alter the amount of resistance in the.

shunt circuit at It, so altering the strength of thejexciting-currentpassing in the field-magiet-,F--unti1' the-normal conditions are again restored in the external circuit, M M.

v --In:[ ig. 4 the arrangement is the'saihe as in Fig.1, cxceptthat the regulating magnet S is shown in series relation with the maincon-' duetors M' M. It may be included in said conductors, so as to receive the whole of the current, or the wires leading to the-magnet 'S may form a shunt around a resistance, R, as indicated .in dotted lines, so that onlya fraction of the currentpasses through the said magnet. The series connection may of course be arrangeapplied in like manner to the other 'mcnts herein referred to. We may employ a regulati ng-magnet or other suitable device or devices 'connected in se-.

ries. relationto the main wires, if constant current be p to the mai wires, if constant potential be required, which, under small. variations from y the normalconditions of supply, may throw 30.

into operation suitable electrical or mechanical devices for varying the strength of the magnetic field of the second or excitingdynam'o, as above describcd.- The regulating-magnet or other cont-rolling device thus operates as a rclay.- Fig. 2. illustrates this part of the inventiom Variations from the normalin the external circuit, M M, whiclrafl'ectthe magnet-S, eause the lever-arm Zto close the circuit of either one or othcrof the magnets cc, ac-

0 cording as the conditions exceed or fall short of the standard conditions in the external circuit, M M.

-ZP are the conlacis l'orthe lever-arm Z, and

. led oil the mains, as shown; liy a suitable device-such as the clutch O to which rotary or reciprocating motion'is imparted in any convenient-way, engaging in one or otherof the clutch-wheels \V.W, the resistance it in the exciting-circnit is varied until ilqlliilblilllll is again restored in the external circuit. The arrangement shown consists of a centered armature, n, attracted .to one side or the other by the cores of the coils c or 0 according to which coil receives current, so as to move the clutch G into gear with'either the wheel For the wheel WV, which are mounted looselyon the shaft by which the clutch G is rotated, and so drive the wheelp and worm 91 and so the quadrant r and arm r ol' the contact-maker for the resistance 1t,in one orothcr direction to cut resistance in or out.

We may obtain the constant portion of the exciting-current for the primary gcnerator--. viz.,that portion constituting the fixed strength of field usual to all compound self-regulating mnchincs from the pri iuarygenerator direct,

'mmare the circuit-wires for the coils c ively.

'quired, or in shunt relation,

39 3) BEST AVAILABLE cop the current used forjthis purpose being commutated, so as to. make it continuous within the said fields, the variable or correcting strength of field necessary to produce constant current. or constant potential under variations of em ternal work being obtained with or without the use of a relay. as in Figs. 2 and 1, respect;

Th us in Fig. 3 Arepresen'ts the. armature of the alternate-current dynamo-machine,

it-portion of the current produced by which,

as shown at a, is used to excite thefield F, as

shown at f, the current'used forthis purpose being rendered continuous by the commutator K. This provides the fixed portion of the fieldmagnetism. The variable portion, as shown at f, maybe obtained and controlled as in either of the'methods shown in Figs. 1

and 2; or we reverse the arrangement and regulate .by varying the exciting-current ob tained by eommutation' from the alternate-current gheratom-or. we may regulatoboth. A

. We claim as our invention Ordis'covcry-f 1. The combinatiomwith the alternate-current dynamo, the main circuit supplied thereby, the exciting-dynamo, and theexeiting-eircnit, which includes the fields of. both dyna; Tnbs,of a shunt on said exciting-circuit around the field of the saidexci-tin'g-d-ynamo, a variable resistance 'in said shunt, and a regulat: ing magnet .or device responsive to alternating currents, electrically connected with said.

main circuit, and liaving amovable part con- 'iie'cted with said resistaig'ce,substantially as described.

.2. The co'mbinatiom'with thealteruate-current dynamo, the main circuit supplied there.

by, and the exciting-dynamo, of means for varying the field-circuit of said exciting-dynamo,

and a regulatingmagnet or device responsive.

to alternating currents, electrically connected with the main circuit; and having a movable part connected with said means, so as automatically to regulate said alternate-current dynamo by operating on the field-circuit of the said exciting-dynamo, substantially. as described.

3. The combination, with the alternate-current dynamo, the main circuit supplied thereby, and the exciting-dynamo, of means for varying thefield-circuitaof the said exciting-dynamo, power mecha'nismior' operating said means, and a relay for bringing said means A into action, said relay comprising a regulating magnet or device responsive to alternating currents,electrically connected with the main circuit, and having a moy'able part which,

through the intermediary of the said power mechanism, adjusts said means, andtherchy automatically regulates Qsaid alternate-current dynamo by operating .01 the field-circuitof the said excitingrdynamo,fs'iibstantially as'do scribed.

4-. The combination, with an alternate-car .rcnt dynamo, the main circuit supplied thereby,the exciting-dynamo, and the "exciting-circuit supplied by the last-mentioned dynamo,

of an exciting-circuit which supplies a current from the altcinntecurrcntdynamo to excite the field thereof, a commutator insaid Inst-mentioned circuit for converting the alternating into a straight current, means for varying one, at least, of the said exciting-nip wits, and a regulating magnet or device re sponsive to alternating currents, electrically connected with said main circuit, and having a movable part connected with said means, so as automatically to regulate the said alternatecurrent'dynamo throngnsnid' means, substantially as described. Y

in testimony whereofi we have signed our names to this specification in the presence of two subscribing witnesses.

$013131?! PERCY SELLON'. V M. MORDEY.

Witnesses:

Guns. J s. JONES, HENRY NEWBY, 120th of 47' LincoZ-ns Inn Eields, London. 

